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System Safety is the overarching discipline that aims to achieve safety by reducing risks in technical systems to an acceptable level. According to the widely adopted system safety standard IEC 61508, [ 1] safety is “freedom from unacceptable risk of harm”. As software alone – which can be considered as pure information – cannot cause ...
An example of a physical security measure: a metal lock on the back of a personal computer to prevent hardware tampering. Computer security (also cybersecurity, digital security, or information technology (IT) security) is the protection of computer software, systems and networks from threats that may result in unauthorized information disclosure, theft of (or damage to) hardware, software, or ...
Internet security. Internet security is a branch of computer security. It encompasses the Internet, browser security, web site security, [ 1] and network security as it applies to other applications or operating systems as a whole. Its objective is to establish rules and measures to use against attacks over the Internet. [ 2]
A safety-critical system is designed to lose less than one life per billion (10 9) hours of operation. [ 7][ 8] Typical design methods include probabilistic risk assessment, a method that combines failure mode and effects analysis (FMEA) with fault tree analysis. Safety-critical systems are increasingly computer -based.
A cryptosystem is considered to have information-theoretic security (also called unconditional security [1]) if the system is secure against adversaries with unlimited computing resources and time. In contrast, a system which depends on the computational cost of cryptanalysis to be secure (and thus can be broken by an attack with unlimited ...
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